Here is a link a list that was compiled of Leonardo Da Vinci’s 10 Best Ideas. Some of them are pretty cool, actually all of them are.
9) Scuba Da Vinciâ€™s fascination with the sea spurred many designs for aquatic exploration. His diving suit was made of leather, connected to a snorkel made of cane and a bell that floated at the surface. Proving the artist was also practical, the suit included a pouch the diver could urinate in.
5) The Aerial Screw Modern scientists agree it may never have lifted off the ground, but Da Vinciâ€™s “helicopter” design is still one of his most famous. The curious contraption was meant to be operated by a four-man team and could have been inspired by a windmill toy popular in Leonardoâ€™s time.
3) The Self Propelled Car It’s no Ferrari, but Da Vinciâ€™s designs for a self-propelled vehicle were revolutionary for his day. His wooden â€œcarâ€ moved by the interaction of springs with geared wheels. Scientists at one museum in Florence built a replica in 2004 and found it worked as Da Vinci intended.